#import <objc/Object.h>

@interface Animal : Object
{
    double weight;
    double x, y;
}

- (void) setWeight: (double) w;
- (double) getWeight;
- (void) setPosX: (double) xValue setPosY: (double) yValue;
- (double) getPosX;
- (double) getPosY;
- (id) reproduce: (id) other;

@end
